Also he's just plagiarizing Scott Adams's notion of a "talent stack."
I believe the talent stack is a valid principle, but it doesn't just double your success if you go to toastmasters and learn how to present and at your job you have neither a commission nor any customer contact.
>> The more skills we have, the more odds we have to become successful. I like how Scott Adams, the creator of Dilbert, explains the concept of Skill Stacking ...